Do you have any remedies for clearing up a cold sooner?

So, I’m going on my third week of being sick. It’s not the kind of sick that I need to go to the doctor for, but I can’t just stay home and rest either. My school has this lovely little mandatory attendance policy… So, I’m turning to the collective to see if you have some odd or little-known remedies for clearing up a cold.

My symptoms are:
-Seriously stuffy nose
-Muscle aches
-Coughing
-Hurt throat though I suspect this is because I’ve been coughing for almost three weeks.

So, can you help me? Anything would be appreciated.

Please do not just tell me to just go to the doctor. It would be silly to go to the doctor and have them tell me that I have a cold and that I just need to rest.